US1908137A

US1908137A - Oil seal

Info

Publication number: US1908137A
Application number: US566069A
Authority: US
Inventors: Allen F Gardner
Original assignee: Chicago Rawhide Manufacturing Co Inc
Current assignee: Chicago Rawhide Manufacturing Co Inc
Priority date: 1931-09-30
Filing date: 1931-09-30
Publication date: 1933-05-09
Anticipated expiration: 1950-05-09

Description

May 9, 1933.

A. F. GARDNER n OIL SEAL Filed sept. so, 1931 Patented May 9, 1933 UNITEn STATES NPATENT olfrlc ALLEN F.

FACTURING GARDNER, OF DETROIT, MICHIGAN, ASSIGNOR TO CHICAGO BAWHIDE MANU- COMPANY, OF CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS AppIication led September 30, 1931.

This invention has to do with oil seals of the type used in the ends of oil-lilled housings about moving shafts for the'purpose of retaining the oil in the housings and pre'- venting it from leaking out along the shafts.

The object of the invention is to provide a self-contained oil seal unit of the type described which is very inexpensiveto manufacture, will stand up under hardI and continuous service, and will give an eflicient sealing action.

Another object of the invention'is to provide a self-contained unit which includes a packing element which comparatively quite small in size.

While the foregoing statement is indicative in a general way of the nature of the invention, other more specic objects and advantages will be apparent in the art upon a full understanding of the construction, arrangement and function of the parts combined to produce the improved seal.

ln order that the invention may be readily understood, one sented herein, but it will of course be appreciated that the invention is susceptible of embodiment in, other structurally modified forms coming equally within the scope of the ap ended claims. i In' t e accompanying `drawing:.

Fig. 1 is a diametric section through the improved seal,l showing the same in oper,- ative position within a housing about a shaft; v

Fig. 2 is -a similar section through ythe seal,` showing the same before being installed; and f I Fig.V 3 is apartially broken away end view of the seal.

The improved sealfflilze other seals of the sametype--is adapted to be positioned in a tubular housing tion to a centrally located shaft 11. The seal consistsof a cage 12, a .packing 13, a spring 14 and avvashery 15. y n

vThe cage 12 isa cup-shaped sheet metal stamping in which thev other parts of ,the

seal are contained. The bottom of the cag` is centrally apertured at 16, in order to to those skilled' form of the sameis prev .portion 27 of the 1() in encompassing rela- V lcal portion 23 of the cage 12 1n Serial No. 566,069.

about the shaft 11, with a certain amount of radial clearance. The cagecontainsthree axially spaced

annular seats

17, 18 and 19 which areprogressively smaller'in diameter.

The washer lis positioned in the cage 12 with the outer portion 20 of the washer in engagement with the largest seat 17 of the cage and with the the washer projecting inwardly a'considerable distance beyond the inner edge of such seat.

The washer is provided at its outer periphery-with an axially extending flange 22 which projects away from the seat 17, and the cage 12 is provided about the outer edge of the seat 17 with an axially extending cylindrical portion 23 which encases the flange 22 on the washer and terminates in an inturned rim 24 which abuts against the edge of the flange 22 and holds the Washer 1n position.

The packing 13--which is preferably made of sheet leather and is provided with both va radiallyextending portion 25 and an axially extending portion 26-is quitel a bit smaller than either the cage or the washer and is positioned inthe cage with the radially extending portion 25 thereof clamped under pressure between the intermediate seat 18 and the inwardly projecting portion 21 of the washer, The axially extending portion 26 of theHpacking-p-.which is intended to lit snugly about the shaft 11 and is preferablyof conical form before being distended by the shaft-projects toward' the small seatv 19 in `the bottom of the cage and is pro- `tected `at all times by kthe encompassing latter, which portion is preferably ,made cylindrical inform.

The spring 14Whichis `preferably made inthe form of any endless coil--its about inner portion 21 ofl the axially extending portion 26 of the packing in abutmentwith the seat19 in the cage.

rThe abovev described oil retainer is constructed'and assembledas a complete unit separate and apart from the members which it is adapted to seal. To installthe device, it is merely necessary to insert the same in the housing to be sealed, with the cylindrifluid-tight and preferably forced fit, engagement with the inside wall of the housing. In some types of installations, where the housing is relatively small, the same ,sized device may -be used with such a housing by fitting the smaller cylindrical portion 27 of the cage tightly into the housing and allowing the larger. portion 23 to abut with and project from the end of the housing.

I claim:

l. As an article of manufacture, a selfcontained seal for application as an assembled unit to a housing in encompassing relation to a-centrally located shaft, consisting of a centrally apertured sheet metal cage which contains annular seats of different diameters, a Washer which is fastened in the cage against the largest seat, a packing of considerably smaller diameter than the washer which is clamped in the cage against the. next seat by the inner portion of the washer, and a spring which encircles the inner portion of the packing and is positioned against the smallest seat.

2. As an article of manufacture, a selfcontained seal for application as an assembled unit to a housing in encompassing relation to a centrally located shaft, consisting of a centrally apertured sheet metal cage which contains annular seats of different diameters, a washer which is fastened in the cage. against the' largest seat, and a packing of considerably smaller diameter than the washer which is clamped in the cage against the next seat by the inner portion of the Washer, said cage having a cylindrical p0rtion which encompasses the washer, and said Washer having a fiange on the outer peripher`y thereof which underlies the cylindrical portion of the cage.

3. As an article of manufacture, a selfcontained seal for application as an assembled unit to a housing in encompassing relation to a centrally located shaft, consisting of a centrally apertured sheet metal cage which contains annular seats of different diameters, a washer which is fastened in the ,cage against the largest seat, and a packing of considerably smaller diameter than the washer which is clamped in the cage against the next seat by washer, said cage having a cylindrical portion. which encompasses the washer, said washer having a flange on the outer periphery thereof which underlies the cylindrical portion of the cage, and said cage having an inturned rim which engages with the edge of the flange on the washer.

4. As an article of manufacture, a selfcontained seal for application as an assembled unit to a housing in encompassing relation to a centrally located shaft, consisting which contains annular seats of different diameters, a washer which is fastened in the the inner portion of thev apertured sheet metal cage cage against the largest seat, and a compressible sheet leather packing of considerably smaller diameter than the washer which is clamped in the cage against the next seat by the inner portion of the Washer, said seats being spaced apart a distance which corresponds approximately to the thickness of the packing when compressed.

5. As an article of manufacture, a selfcontained seal for application as an assembled unit to a housing in encompassing relation to a centi-ally located shaft, consisting of a centrally apertured sheet metal cage having an annular seat, a cylindrical wall portion which extends axially from the outer periphery of the seat, and a second cylindrical wall portion of relatively small diameter which extends axially in the opposite direction from the inner periphery of the seat; a packing having a radially 'extending portion which beai's against the seat and an axially extending portion which projects into the small cylindrical portion of the cage; a spring which is confined within said smaller cylindrical portion in engagement` .with the axially extending portion of the packing; and a washer which is positioned in the large cylindrical portion of the cage in clamped engagement with the radially extending portion of the packing and is provided about its outer periphery with an axially extending flange which forms a reinforifement for the large cylindrical portion of the cage.

6. As an article of manufacture, a self contained seal for application as an assembled unit to a housing in encompassing relation to a centrally located shaft, consisting of a centrally apertured sheet metal cup Which is provided with a flat annular seat in axially spaced relation to the bottom of the same, a sheet leather packing which is positioned against'said'seat and is provided with an axially extending portion which projects toward the bottom of the cup, an annular spring in said bottom in engagement with the axially extending portion of the packing, and a Washer clamped against the other side of the packing.

7. As an article of manufacture, a selfcontained seal for application as an assembled unit to a housing in encompassing relation to a centrally located shaft, consisting of a centrally apertured sheet metal cup which is provided with a flat annular seat in axially spaced relation to the bottom-of the same, a sheet leather packing which is positioned against said seat and is provided with an axially extending portion which projects toward the bottom of the cup, an

annular spring in saidbottom in engagerim of the cup` in axially locked engagement with the edge of the Washer.

8. As an article of manufacture, a selfcontained seal for application as an assembled unit to a housing in encompassing relation to a centrally located shaft, consisting of a centrally apertured sheet metal cage which contains annular seats of different diameters and is provided at its outer edge with an axially extending rim, a sheet metal Washer of relatively heavy gaugewhich is fastened in the cage against the largest sea-tand is provided at its outer edge with an axially extending rim Which fits within and is engaged bythe rim of the cage, a flexible sheet packing of considerably smaller diameter than the Washer provided with a radially extending portion which is clamped in the cage against the next seat by the inner portion of the Washer and provided with a conical axially extending portion .of substantially uniform thickness Which projects toward the smallest seat and terminates in an abrupt sealing edge, and an endless coil spring which is positioned under tension about the conical portion of the packing adjacent the sealing edge thereof in substantially spaced relation to the axially extending portion and is-confined against displacement by the smallest seat.

9. As an article of manufacture, a self contained seal for application as an assembled unit to a housing in encompassing relation to a centrally located shaft, consisting of a centrally apertured sheet metal cage having an annular seat, a cylindrical Wall portion which extends axially from the out er periphery of the seat and terminates in an inturned edge, and another Wall portion o f relatively small diameter which extends axially in the opposite direction from the inner periphery of the seat and terminates in an inwardly turned end portion; a packing which is contained Wholly Within the cage and has a radially extending portion which bears against theseat and an axially extending portion which projects into the small diameter portion of the cage and te:n ininates at a point closely adjacent said inA Wardly turned end portion of the cage; an endless coil spring Which is enclosed Within said small diameter portion of the cage'iit engagement with the axially extending por tion of the packing at the end thereof and is confined against displacement from the packing by the inturned end of the cage; and a Washer which is positioned in the large cylindrical portion of the cage in clamped engagement With the radially extending portion of the packing and is provided about its outer periphery with an axially extending flange which alouts againstthe inturned edge on the large cylindrical portion of the cage and form a .reinforcement for said large cylindrical portion.

10. As an article of manufacture, a selfcontained seal for application as an assembled unit to a housing in encompassing relation to a centrally located shaft, consisting of a centrally apertured sheet metal cup Which is provided with a flat annular seat in axially spaced relation tothe bottom of the same, which bottom is of smaller diameter than the seat, a sheet leather packing Which is positioned against said seat and is provided with an axially extending portion Which projects toward the bottom of the cup and is contained Wholly Within the cup, an annular spring in Isaid bottom in engagement with the end of the axially extending portion of the packing and also the bottom of the cup, a Washer clamped against the other side of the packing, and means adja' cent the rim of the cup for locking the Washer in its clamped position.

In testimony whereof I have hereunto subscribed Iny name.

ALLEN F. GARDNER.

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